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View Full Version : throttle curves and motor efficiency ? flight time?


concept1
09-17-2007, 08:46 AM
Ok, I am looking for anyones thoughts on motor performace/ efficiency and flight times with any given throttle curve. when I had the stock motor I was running a flat 100% curve because I needed the head speed. But now with the 1000w motor I get plenty of head speed around the 85-90% range.
so if this is the case is it more efficient to run the throttle curve at a flat90% fl;at 100% or so or to use a actual curve or like 100 95 90 95 100 or100 90 80 90 100 etc. obviously using the 100% will give more punch because the head speed will rise but on a electric won't it just pull maybe uneeded amps, and even on a flat curve won't it just pull the needed amps to keep the head speed? basically will the motor likely run more efficient at a lower throttle curve or will it not really matter given the same flying style?

faxxe
09-17-2007, 08:54 AM
Hi!

Good question! I´m also interested......
Heimo

poerqwa
09-17-2007, 11:35 AM
For any ESC 100% all the time is the most efficient(see it as straight thru).
Once you go below that some mechanism needs energy to arrange what you request and most probably will have to get rid of the "downgraded" energy as heat(and heat is not your friend in this case :) )
Some ESC are better than others, some get fried when running well below the 100% others don't have a problem(like kontronic).

You probably don't want to go 100% all the time as to leave a bit of headroom(which is also true when using it in governor mode).

At least this is how I understand it

I aim for 90% by changing the gearing.

concept1
09-17-2007, 12:01 PM
so then just What is the relationship between Load Amps and throttle speed? for example if I do a flip at 90% throttle and another at 100% throttle the head speed will be higher on the 100% throttle and most likely you might not hear as much of a rpm drop but will the 100% throttle flip pull more current then the 90% throttle flip? will the Heli at hover pull more amps at throttle of 100% then it will if I hover at 90% throttle. lets just for the sake of argument say at 100% throttle I get a head speed of 2400, and at 90% 2100, either head speed would be acceptable for most 3D, of course 2400 will be quicker, but if you only want longer flight time can it be done by choosing a given throttle setting